4982370
Twelve Point Cap Screw
Cummins®

The 4982370 Twelve-Point Cap Screw is a specialized fastener produced by Cummins, a leading manufacturer in the commercial truck industry. This component is designed for use in various applications within commercial trucks, where it plays a role in securing critical components and assemblies. Its robust design and high-quality construction make it suitable for the demanding conditions encountered in heavy-duty truck operations ¹.

Basic Concepts of Twelve-Point Cap Screws

A twelve-point cap screw is a type of fastener characterized by its hexagonal head with twelve points, as opposed to the more common six-point design. This design allows for greater torque application without the risk of cam-out, which can occur with six-point fasteners. Twelve-point cap screws are commonly used in mechanical assemblies where high torque and resistance to loosening are required. They are often found in applications involving heavy machinery and equipment, including commercial trucks ².

Purpose and Role in Truck Operation

The 4982370 Twelve-Point Cap Screw serves a specific purpose in the context of commercial truck operations. It is used to secure various components and assemblies, contributing to the overall functionality and reliability of the truck. By providing a strong and secure connection, this fastener helps ensure that critical parts remain in place under the demanding conditions encountered in heavy-duty truck operations.

Key Features

The 4982370 Twelve-Point Cap Screw features a robust design that includes a twelve-point head for enhanced torque application and resistance to cam-out. It is constructed from high-quality materials, ensuring durability and longevity in harsh operating conditions. The screw’s design also includes features that enhance its performance, such as a precise thread profile for optimal engagement and a corrosion-resistant coating to protect against environmental factors.

Benefits

Using the 4982370 Twelve-Point Cap Screw offers several benefits. Its twelve-point design allows for improved torque application, reducing the risk of cam-out during installation and removal. The screw’s resistance to loosening ensures that critical components remain securely fastened, even under vibration and dynamic loads. Additionally, its high-quality construction and corrosion-resistant coating contribute to its longevity, making it a reliable choice for commercial truck applications.

Installation Guidelines

To ensure optimal performance and safety, follow these guidelines when installing the 4982370 Twelve-Point Cap Screw:

1. Prepare the Surface: Ensure the mating surface is clean and free of debris to promote proper engagement and seating of the screw.
2. Use the Correct Tool: Employ a twelve-point socket or wrench to avoid damaging the screw head and to apply torque effectively.
3. Apply Torque Gradually: Tighten the screw gradually to the specified torque value, using a calibrated torque wrench to ensure accuracy.
4. Check for Proper Seating: Verify that the screw is fully seated and that the component is securely fastened.

Troubleshooting Common Issues

Common problems associated with twelve-point cap screws include loosening, corrosion, and damage to the screw head. To address these issues:

• Loosening: Re-tighten the screw to the specified torque value and inspect for any underlying causes, such as vibration or dynamic loads.
• Corrosion: Clean the screw and mating surface, and apply a corrosion-resistant coating if necessary.
• Damaged Screw Head: Replace the damaged screw with a new one to ensure a secure connection.

Maintenance Tips

To prolong the service life and maintain the efficiency of the 4982370 Twelve-Point Cap Screw, consider the following maintenance tips:

• Regular Inspection: Periodically check the screw for signs of loosening, corrosion, or damage.
• Torque Check: Verify that the screw remains tightened to the specified torque value.
• Cleaning: Keep the screw and mating surface clean and free of debris to prevent corrosion and ensure proper engagement.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has established a strong reputation in the commercial truck industry for producing high-quality, reliable components. The company’s product range includes engines, powertrain components, and aftermarket parts, all designed to meet the demanding requirements of heavy-duty applications.

Cummins Twelve-Point Cap Screw 4982370 in Engine Applications

The Cummins Twelve-Point Cap Screw part number 4982370 is a critical component in various engine assemblies, ensuring secure fastening and structural integrity. This part is integral to the assembly and maintenance of several Cummins engines, including the QST30, CM2350, and T101 series.

QST30 and CM2350 Engines

In the QST30 and CM2350 engines, the 4982370 cap screw is utilized in multiple locations where high-strength fastening is required. These engines are known for their robust design and reliability, often used in heavy-duty applications. The cap screw’s twelve-point design provides better grip and reduces the likelihood of rounding off, which is crucial for maintaining the integrity of engine components under high stress and vibration.

T101 Engine

The T101 engine also incorporates the 4982370 cap screw in its assembly. This engine is designed for durability and efficiency, often used in industrial and commercial applications. The cap screw’s role in the T101 engine is to secure various engine parts, ensuring that they remain tightly fastened and aligned, which is essential for the engine’s performance and longevity.

Grouping of Engines

The QST30 and CM2350 engines can be grouped together due to their similar applications and design philosophies. Both engines benefit from the use of the 4982370 cap screw in maintaining the structural integrity of their components. The T101 engine, while distinct in its specific applications, also relies on this cap screw for critical fastening tasks, ensuring that it can perform reliably in demanding environments.

The use of the 4982370 cap screw across these engines highlights its importance in Cummins’ engine design, providing a reliable and secure fastening solution that contributes to the overall performance and durability of the engines.

Role of Part 4982370 Twelve-Point Cap Screw in Engine Systems

The part 4982370 Twelve-Point Cap Screw is integral to the assembly and maintenance of various engine components, ensuring secure and reliable connections. In the context of engine systems, this cap screw is commonly used in the following applications:

Pump Assemblies

In pump assemblies, the Twelve-Point Cap Screw is employed to fasten critical components such as pump housings, impellers, and shaft assemblies. Its design allows for efficient torque application, ensuring that the pump components remain tightly secured during operation. This is particularly important in high-pressure environments where any loosening of parts could lead to significant performance issues or even failure.

Lubricating Oil Systems

Within lubricating oil systems, the Twelve-Point Cap Screw plays a vital role in securing oil filters, pressure relief valves, and various connection points within the oil passages. The screw’s twelve-point design provides enhanced grip, reducing the risk of cam-out during tightening or removal. This ensures that oil system components remain sealed and operational, maintaining the necessary lubrication for engine parts and contributing to the overall efficiency and longevity of the engine.

Conclusion

The 4982370 Twelve-Point Cap Screw is a critical component in the commercial truck industry, providing secure and reliable fastening solutions for various engine and truck applications. Its robust design, high-quality construction, and corrosion-resistant features make it an essential part for ensuring the functionality and longevity of heavy-duty truck operations. Proper installation, maintenance, and troubleshooting are key to maximizing the benefits of this Cummins part.